An interval at which the `pageFunction` is executed, defaults to `raf`. If `polling` is a number, then it is treated as an interval in milliseconds at which the function would be executed. If `polling` is a string, then it can be one of the following values:
-`raf` - to constantly execute `pageFunction` in `requestAnimationFrame` callback. This is the tightest polling mode which is suitable to observe styling changes.
-`mutation` - to execute `pageFunction` on every DOM mutation.
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<tr><td>
signal
</td><td>
`optional`
</td><td>
AbortSignal
</td><td>
A signal object that allows you to cancel a waitForFunction call.
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<tr><td>
timeout
</td><td>
`optional`
</td><td>
number
</td><td>
Maximum time to wait in milliseconds. Defaults to `30000` (30 seconds). Pass `0` to disable the timeout. Puppeteer's default timeout can be changed using [Page.setDefaultTimeout()](./puppeteer.page.setdefaulttimeout.md).